You are downloading the Interpreter XAP file v0.0.3.0 for Windows Phone. Interpreter is a free and useful Education app: "Interpreter" - translator acquires text the keyboard in real time, translates it and reads it for you into one the 60 (*) available languages. ... You can now download the offline XAP file to install & try it.
Download Locations for Interpreter 0.0.3.0 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Interpreter XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.